Automatic Optic Disc Detection in Color Retinal Images by Local Feature Spectrum Analysis

Computational and Mathematical Methods in Medicine
Wei ZhouYugen Yi

Abstract

The optic disc is a key anatomical structure in retinal images. The ability to detect optic discs in retinal images plays an important role in automated screening systems. Inspired by the fact that humans can find optic discs in retinal images by observing some local features, we propose a local feature spectrum analysis (LFSA) that eliminates the influence caused by the variable spatial positions of local features. In LFSA, a dictionary of local features is used to reconstruct new optic disc candidate images, and the utilization frequencies of every atom in the dictionary are considered as a type of "spectrum" that can be used for classification. We also employ the sparse dictionary selection approach to construct a compact and representative dictionary. Unlike previous approaches, LFSA does not require the segmentation of vessels, and its method of considering the varying information in the retinal images is both simple and robust, making it well-suited for automated screening systems. Experimental results on the largest publicly available dataset indicate the effectiveness of our proposed approach.

References

Jul 22, 1999·The British Journal of Ophthalmology·C SinthanayothinT H Williamson
Jul 7, 2001·Neural Computation·B SchölkopfR C Williamson
Aug 9, 2003·IEEE Transactions on Medical Imaging·Adam Hoover, Michael Goldbaum
Jan 11, 2007·Survey of Ophthalmology·Esther M HoffmannRobert N Weinreb
Jun 9, 2007·Medical Engineering & Physics·Clara I SánchezDaniel Abásolo
Feb 14, 2008·IEEE Transactions on Medical Imaging·A R YoussifA R Ghoneim
May 17, 2012·IEEE Transactions on Information Technology in Biomedicine : a Publication of the IEEE Engineering in Medicine and Biology Society·H YuP Soliz
Apr 20, 2017·Computational and Mathematical Methods in Medicine·Wei ZhouWenyou Du

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Methods Mentioned

BETA
feature extraction
feature spectrum

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